Question

help me please. factorisation ​

Answer 1

Answer:

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Answer 2

Answer:

$(a^2-b^2)(c^2-d^2)-4abcd$

$a^2c^2-a^2d^2-b^2c^2+b^2d^2-4abcd$

$(a^2c^2+b^2d^2-2abcd)-(a^2d^2+b^2c^2+2abcd)$

            Using formula's $(x-y)^2=x^2+y^2-2xy$ and $(x+y)^2=x^2+y^2+2xy$

$(ac-bd)^2-(ad+bc)^2$

             Using formula $x^2-y^2=(x+y)(x-y)$

$[(ac-bd)+(ad+bc)][(ac-bd)-(ad+bc)]$

$(ac-bd+ad+bc)(ac-bd-ad-bc)$